Igniter magneto-generator.



H. G. MUELLER. IGNITER MAGNETO GENERATOR. -APPL|CAT|0N FILED JUNE 21, I914.

Patented July 20, 1915.

a citizen of the United States, "Milwaukee, county'of Milwaukee, of- Wisconsin, have HERMAN C. MUELLER, F MILWAUKEE, WISCONSIN, ASSIGNOR T0 EVINRUDE IMO TOR COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

, remr'nn MAGNETO-GENERATOR.

To all whom it may concern; I

Be it known'that I, HERMAN C. Mummn,

and State invented new and useful Improvements in Igniter Magneto-Generators, of which the following is a specification.

My invention relates to improvements in igniter magneto generators for internal combustion engines of that type in which the fly wheel is provided with permanent field .magnets and utilized as the rotor, the armature being relatively stationary and inclosed within the rim of the fly wheel.

' In a former application filed July 17th, 1913, Serial No. 779423, I have shown and described one form of magneto generator of this type or class in which the axis of the armature crosses that of the crank shaft, the

residing at Specification of Letters Patent.

armature heads being diametrically opposite.

The object of my present invention is to further improve the armature stator in a magneto of the described class by providing an ofl'set armature magnet detachably connected withrhead pieces which may be permanently secured to the supporting plate or disk at diametrically opposite points, whereby the armature coil or magnet may be removed, repaired, and replaced Without disturbing the head pieces, and whereby in the construction of the magneto, the head pieces may be permanentlysecur'ed to the supporting disk and their outer curved surfaces accurately machined without danger of .dis-

- placement by subsequent readjustments. J

A further object of my invention is to simplify and reduce the cost of construction of the armature and to more fully expose tions, whereby repairs and readjustments arefacilitated, the parts being constructed and organized with a view of providing a .magneto generator which will operate rethat the rotation of the .fly wheel may be reversed without affecting ver'sibly in the sense 'the efliciency' of the.- magneto, and without requiring any readjustment, except aslight shifting of the timer lever to properly advance the spark for reverse movement.

electrical connec-- r In the drawingsFigure 1 isan elevation- .iof my improved magneto generator with a Patented July 20, 1915; Application filed June'27, 1914. 7 Serial No. 847,582. I i

portion of'the fly wheel broken away to expose the field magnets, pole pieces, and a portion of' the armature. gtional view, drawn-on Fig. 3 is an elevation of the stator, the fly Wheel being'removed, Fig. 4 is a detail end view of the armature, showing the same with the head piece separated from the central core, which carries the coil.

Fig. 2 is, a sec- Like parts are identified by the same ref-. throughout the several erence' characters views.

. The lar 2, erates' crank Shaft 1 is provided with a 051 having a cam projection 3 which opthe circuit breaker by actuating'the line arr-a: of Fig. 1.

arm 1 of the interrupter lever, whereby the arm *5 may be actuated once during each revolution of the crank shaft into contact with terininalG. As soon as the cam 3 clears I the interrupter lever 4, arm 5 will be retracted to circuit breaking position by the reaction of a spring 7 interposed between tion. A

the arm 5 and the' timer lever 8. For the purpose of this application, these parts may beregarded as of any ordinary construc- The .arm 4 is pivotally supported from a stator disk 10,-and a stop extremity ofrsaid arm out of contact with the collar 2, but the rounded head 12 on the arm is in the path of cam projection 3. At one side of I the side opposite the timer lever, the cenpin 11 holds the the crank shaft, preferably on trally wound member 15- of the armature is 1 mounted and detachably supported from the stator disk 10, as will now be explained.

Armature head pieces 16 and 17 are secured to the supporting disk 10 at diametrically ,opposite points by screws or bolts 14. Each of these head pieces 16 and 17 is provided.

with an arm 18, which over-laps and'is secured to one of the polar projections'19 of the core of the member 15- which carries the generating coils. Clamping bolts 20 are employed to bind including the coil, is offset laterthe arms 18 rigidly to the 'core projections 19. It will therefore be observed that the central portion 15of the armature,

cuit being broken immediately after the really from the crank shaft and detachably connected with the armature head pieces 16 and 17. Therefore, if the armature coil burns out or is damaged in any manner, it may quickly be removed by first removing the bolts 20 and then disengaging the coil and core by lateral movement.

The fly wheel comprises a disk 25 provided witha hub 26 and rim 27 and this fly wheel is adapted to receive the armature within rim 27, as clearly shown in Fig. 2, the crank shaft being tapered and fitted to the hub 26 and secured thereto by a nut 28. A set of segmental permanent magnets 30 and 31 are secured to the inner face of the fly wheel rim and are also connected by screws 32- with inwardly projecting segmental pole pieces 34 of the rotating field thus provided. The armature pieces or heads 16 and 17 are adapted to span the gaps 35 between pole pieces 34 twice during each revolution of the flywheel, and

the eccentric 3 is so located with reference to the field pole, pieces 34 that the interrupter lever will be actuated to'close the circuit preparatory to the relative'traverse of the gaps 35 by the armature heads 16 and 17 the circeding extremity of the field pole piece immediately the ing motor boats, etc. gears in connection with such engines materially complicates the structure and increases roviding a reversible mag-' draws away from the armature head. The circuit is therefore broken 'substantially'at the instant of maximum magnetic flux.

Owing to the fact that the circuit is closed preparatory to the spanning of gap 35 between thearmature heads 16 and 17, and broken at substantially the same interval following the central gap spanning position, it is obvious that the magneto can be operated regardless of the direction of fly wheel rotation. To reverse the engine, it is therefore merely necessary to allow the rota-.

tion of the fly wheel to stop and then start it in the opposite" direction with a slight shifting of the timer lever to properly advance the spark, as is common practice in the oper- -at1on of magneto generators.

I do not deem it necessary -to describe the electrical connections nor. the details of construction. of the various parts above mentioned, as the arrangement of the circuits will be fully understood by anyone skilled in this art. It may be stated, however, that magnet core of the armature is preferably laminated and'that the-pole pieces are also laminated, as shown. Also that a condenser38 is employed to secure a more effective discharge at the spark terminals.

My invention is peculiarly adapted for use in connection with small quick running internalcombustion engines used for operat- The use of reversing the cost. By

neto, I am ena led to dlspense with reversing gearing, since I am able to almost instantly reverse the engine.

I claim 1. A reversible magneto generator including an armature, comprising a centrally wound core and a set of segmental armature head pieces detachably connected with the core and offset in one direction therefrom, whereby said armature may be assembled within a rotating field with the head pieces on diametrically opposite sides of the axis of the field, and the centrally wound core ofi'set laterally from said axis and head pieces.

2. An armature for igniter magneto generators, comprising a centrally wound core member and a set of segmental head pieces connected with the core member and offset at one side thereof, said core member and its winding being wholly to one side of a line terrupter, of a relatively stationary supporti an armature member provided with a current generating coil located at one side of. the crank shaft, and a pair of segmental armature head pieces fixed to said support on opposite sides of the crank shaft-and connected with said armature member upon which the coil is located, the central portions of said head pieces being in a line which extends through the crank shaft, the coil being laterally offset from said line.

4. The combination with the crank shaft of an internal combustion engine, a rotary field magnet provided with segmental pole pieces and means for operating a circuit interrupter, of a r'elatively'stationary support, an armature member provided with a current generating coil located at one side of the crank shaft, and apair of segmental armature head pieces fixed to said support on opposite sides of the crank shaft andconnected with said armature member upon which the coil is located, said armature member being,

5. The combination with the crank shaft of an internal combustion engine, a rotary field magnet provided with segmental pole pieces and means for operating a circuit interrupter, of a relatively stationary support, an armature member provided with a current generating coil located at one side of the crank shaft, a pair of segmental arma ture head pieces fixed to said support on opposite sides of the crank shaft and connected with said coil is located, said head pieces being adapted to spanthe gaps between the field pole pleces successively during the rotation of the field, means for closing the armature circuit imarmature member upon which the mediately before its heads occupy the gap In testimony whereof I afi'lx my signature spanning position, and means for interruptin the presence of two witnesses. mg the armature circuit substantiallyat the instant of maximum magnetic flux as one of 5 the field pieces is withdrawn from its respec- Witnesses:

tive armature headb the continued rotation LEVERE'I'I C. WHEELER,

of the field, substantlally as set forth. IRMA D. BREMER.

-HERMAN O. MUELLER. 

